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Dr Shelley MacDonell

ShelleyMacDonellBsc (hons), PhD (Otago)

PhD Research Topic

Meltwater generation and drainage system development on an Antarctic cold-based glacier 

Aims

  1. To quantify the spatial and temporal variability of meltwater generation on a cold-based glacier.
  2. To understand the development of drainage pathways on a cold-based glacier over the course of a season.
  3. To evaluate whether existing understanding of supraglacial hydrological systems is consistent with the drainage systems that develop on cold glaciers.

Abstract

Glaciers are important indicators of climate change due to their intimate connection with climate patterns. In Antarctica, predictions of future climate change have focused on the large ice sheets and ice shelves, with valley glaciers on the continent being largely ignored. Consequently, sea level rise approximations are conservative. One way to rectify this situation is to monitor the hydrology of these glaciers. By considering the hydrology of McMurdo Dry Valley glaciers, questions regarding climate change predictions for the Ross Sea region can be answered. This study will take a watershed approach of hydrology in the Wright Lower Basin, connecting the glacier system with the proglacial stream. The research aims to understand melt processes and drainage configurations, to lead towards the construction of a drainage systems model.

 

Dissertation

MacDonell, S. 2003. Cold-based glacier behaviour : Victoria Upper Glacier, Antarctica. Unpublished BSc (hons) dissertation, in Geography, at the University of Otago, Dunedin, New Zealand. 102 pp. [abstract]

 

Publications

MacDonell, S. and Fitzsimons, S. (submitted October 2008) Cryoconite holes: a systems review. Progress in Physical Geography.

Fitzsimons, S. J., Webb, N., Mager, S., MacDonell, S., Lorrain, R., Samyn, D. (2008) Mechanisms of basal ice formation in polar glaciers: an evaluation of the apron entrainment model. Journal of Geophysical Research, 113, F02010, doi: 10.1029/2006JF000698.

 

Conference Presentations and Posters 

MacDonell, S. and Fitzsimons, S. (2008) Extremes in catchment hydrology: contributions from glacier hydrology in Antarctica. New Zealand Hydrological Society Annual Conference. Greymouth, New Zealand.

MacDonell, S. and Fitzsimons, S. (2008) Mitigating flow: the role of water storage on the Wright Lower Glacier, McMurdo Dry Valleys. Antarctica New Zealand Annual Conference. Dunedin, New Zealand.

MacDonell, S. and Fitzsimons, S. (2008) Understanding cold-based glacier drainage systems. Departmental seminar to the School of Geography, Environment and Earth Sciences, Victoria University of Wellington. Wellington, New Zealand

MacDonell, S. and Fitzsimons, S. (2007) More than just a pretty tunnel: the tale of K064. Antarctica New Zealand Annual Conference. Wellington, New Zealand.

MacDonell, S. and Fitzsimons, S. (2007) Drainage system development at the Wright Lower Glacier, McMurdo Dry Valleys. New Zealand Snow and Ice Research Group annual conference. Mount Ruapehu, New Zealand.

MacDonell, S. and Fitzsimons, S. (2006) Melt initiation at the Wright Lower Glacier, Antarctica. International Glaciological Society Symposium on Cryospheric Indicators of Climate Change. Cambridge, England.

MacDonell, S. (2006) SCAR conference: the cutting edge of Antarctic research. University of Otago Glacier Research Group. Dunedin, New Zealand.

MacDonell, S. and Fitzsimons, S. (2006) Cold-Based Glacier Hydrology, Wright Lower Glacier, McMurdo Dry Valleys. Scientific Committee on Antarctic Research Open Science Conference, Tasmania, Australia.

MacDonell, S. (2006) The role of cryoconite holes in the hydrological system, Wright Lower Glacier, McMurdo Dry Valleys. Antarctica New Zealand annual conference. Wellington, New Zealand.

MacDonell, S. (2006) Life in the sand: 2.5 months in the McMurdo Dry Valleys. University of Otago Glacier Research Group. Dunedin, New Zealand.

MacDonell, S. and Fitzsimons, S. (2006) Cold-Based Glacier Hydrology, Wright Lower Glacier, McMurdo Dry Valleys. Global Land Ice Measurements from Space workshop, Twizel, New Zealand.

MacDonell, S. and Fitzsimons, S. (2005) The hydrological regime of the Wright Lower Glacier, Antarctica. Antarctica New Zealand Annual Conference. Christchurch, New Zealand.

MacDonell, S. (2005) Cold –based glacier hydrology. New Zealand Snow and Ice Research Group annual conference. Hokitika, New Zealand.

MacDonell, S. and Fitzsimons, S. (2004) Cold-based glacier behaviour: Victoria Upper Glacier, Antarctica. Antarctica New Zealand Annual Conference. Hamilton, New Zealand

 

Contact

E-mail: shelley.macdonell@ceaza.cl

© 2009 Department of Geography, University of Otago, Dunedin, New Zealand